Numerical assessment of the seismic response of hillside buildings
DOI:
https://doi.org/10.4067/S0718-28132022000100068Keywords:
Hillside buildings, Seismic-resistant design, Topographic effectAbstract
The use of hillsides for the construction of structures is problematic, mainly because of two conditions: the variation of the seismic response of the ground, due to the slope; and the modification in the structural configuration to account for the inclination at the base of the structure. These conditions have generated significant seismic damage in high slope areas in past earthquakes. This study seeks to evaluate the possible differences in the seismic response resulting from these two special conditions, evaluated in an uncoupled manner. For this purpose, a series of time-history analyses are performed using modified-by-topography seismic records on a group of structures with different base angles. The structures are first designed and evaluated in nonlinear response by pushover analysis. Greater variations in response are obtained as a result of the variation in the structural configuration (staggered) than as a result of the topographic effect, which, however, increases the aforementioned effects in both damage and displacement levels. The vertical accelerations induced by topography are detrimental to structural performance, with more damage (incursion into the inelastic range) being observed in the structures when these are considered in the analyses, as well as important differences in the axial load levels in the vertical elements.
References
ACI 318-14 (2014). Building code requirements for structural concrete and commentary. American Concrete Institute, Farmington Hills MI, USA.
Ashford, S. and Sitar, N. (1997). Analysis of topographic amplification of inclined shear waves in a steep coastal bluff. Bulletin of the Seismological Society of America 87(3), 692–700.
Ashford, S., Sitar, N., Lysmer, J. and Deng, N. (1997). Topographic effects on the seismic response of steep slopes. Bulletin of the Seismological Society of America 87(3), 701–709.
BCJ (1997). Structural provisions for building structures. Building Center of Japan, Tokyo.
Bouckovalas, G.D. and Papadimitriou, A.G. (2005). Numerical evaluation of slope topography effects on seismic ground motion. Soil Dynamics and Earthquake Engineering 25(7–10), 547–558.
Cousiño, J. (2017). Evaluación de la resupuesta sísmica en la superficie de terreno con pendiente superior a 15° para efectos de diseño de una edificación. Memoria de título de Ingeniero Civil, Pontificia Universidad Católica de Valaparaíso, Chile.
Diaz-Segura, E.G. (2017). Incertidumbres en la estimación del periodo fundamental de terrenos inclinados. Obras y Proyectos 21, 38–44.
DS61 (2011). Reglamento que fija el diseño sísmico de edificios. Decreto Supremo, Ministerio de Vivienda y Urbanismo, Santiago, Chile.
ETABS16 (2016). Structural software for building analysis and design. Computers and Structures Inc. CSI, Walnut Creek CA, USA.
Eurocode 8 (2004). Design of structures for earthquake resistance — Part 1: General rules, seismic actions and rules for buildings. European Committee for Standardization, Brussels, Belgium.
Gómez, M.A., Díaz-Segura, E.G. and Vielma, J. C. (2021). Nonlinear numerical assessment of the seismic response of hillside RC buildings. Earthquake Engineering and Engineering Vibration 20(2), 423–440.
Grelle, G., Bonito, L., Rosalba, M., Iacurto, S., Madiai, C., Revellino, P. and Sappa, G. (2021). Topographic effects observed at Amatrice hill during the 2016–2017 Central Italy seismic sequence. Earthquake Engineering and Engineering Vibration 20(1), 63–78.
Hosseinzadeh, N. (2008). Vertical component effect of earthquake in seismic performance of reinforced concrete bridge piers. 14th World Conference on Earthquake Engineering, Beijing, China.
IBC (2012). International building code. International Code Council ICC, USA.
Mander, J.B., Priestley, N. and Park, R. (1988). Theoretical stress-strain model for confined concrete. Journal of Structural Engineering 114(8): 1804–1826.
Menegotto, M. and Pinto, P.E. (1973). Method of analysis for cyclically loaded RC plane frames including changes in geometry and non-elastic behaviour of elements under combined normal force and bending. Symposium on the Resistance and Ultimate Deformability of Structures Acted on by Well Defined Repeated Loads, International Association for Bridge and Structural Engineering Zurich, Switzerland, 15–22.
NCh3171 (2010). Diseño estructural - Disposiciones generales y combinaciones de cargas. INN, Santiago, Chile.
NCh433 (2009). Diseño sísmico de edificios. INN, Santiago, Chile.
NCh430 (2008). Hormigón armado - Requisitos de diseño y cálculo. INN, Santiago, Chile.
Papadimitriou, A. and Chaloulos, Y. (2010). Aggravation of the peak seismic acceleration in the vicinity of 2D hills, canyons and slopes. Fifth International Conference of Recent Advances In Geotechnical Earthquake Engineering and Soil Dynamics, San Diego CA, USA, paper 3.26ª.
Park, R. (1988). Ductility evaluation from laboratory and analytical testing. Ninth World Conference on Earthquake Engineering, Tokyo-Kyoto, Japan.
Pitilakis, D. (2009). Topographic irregularities and soil – foundation - structure interaction. 3rd Greece-Japan Workshop on Seismic Design of Foundations, Innovations in Seismic Design, and Protection of Cultural Heritage, Santorini, Greece, 335-343.
Sable, K.S. and Nagargoje, S.M. (2012). Seismic performance of multi-storeyed building on sloping ground. Elixir Electrical Engineering 53, 11980–11982.
Seismosoft (2018). SeismoStruct 2018 – A computer program for static and dynamic nonlinear analysis of framed structures. http://www.seismosoft.com
Shrestha, B. (2009). Vertical ground motions and its effect on engineering structures: a state-of-the-art review. International Seminar on Hazard Management for Sustainable Development, Kathmandu, Nepal, 190-202.
Singh, Y., Gade, P., Lang, D. H. and Erduran, E. (2012). Seismic behavior of buildings located on slopes - An analytical study and some observations from Sikkim Earthquake of September 18, 2011. 15th World Conference of Earthquake Engineering, Lisbon, Portugal.
Surana, M., Singh, Y. and Lang, D.H. (2015). Seismic fragility analysis of hill-buildings in Indian Himalayas. SECED Conference: Earthquake Risk and Engineering towards a Resilient World, Cambridge, UK.
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